Quote Originally Posted by Fenring
Wow, I've never seen the AI spam missile units that badly.
I think the OP means that there were only 19 men in one unit of Iosatae (not 19 units of iosatae, which is what I read initially too).

To damage the Gaesatae, use units with javelins, or any ranged units, and charge them with cavalry. Dont let anything get stuck in melee with them unlesss its really unavoidable. Run them around a bit too to tire them out.